According to the comScore Apple App Store Report which observes the most installed applications downloaded via iTunes. Here is a list of  top 25 apps with heavily downloaded from the Apple App store in February 2009 rankings. The top 12 games include Tap Tap Revenge, Touch Hockey: FS5, Pac-Man, iBowl, Labyrinth, Hangman, Mazefinger, Cube Runner, Sol solitaire, Crazy Penguin Catapult, Topple and Sudoku. The top 3 social networking apps are Facebook, MySpeace Mobile, and AIM. The top 4 entertainment apps are Backgrounds, Bubblewrap, Lightsaber Unleashed and Remote. The top 2 music apps includes Shazam and Pandora. Google Earth for top travel app, Movies for top news app. Virtual Zippo Lighter for  lifestyle app and Flashlight for top utility app.

	Tap Tap Revenge Tap Tap Revenge is an iPhone game developed by Tapulous, Inc. It is a music game in the tradition of games like Rock Band, Guitar Hero or Dance Dance Revolution that puts your rhythmic skills to the test in all-new ways. Tap through the beats or shake left and right as the arrows fall. Download exclusive tracks or take on your friends in Tap Tap Revenge’s unique head-to-head two-player mode. More than 50 FREE songs!
	Background Background is an iPhone entertainment application developed by Stylem Media. It is the  most popular Wallpaper app for the iPhone. you can browse and Search over 10,000 unique Backgrounds and choose from over 30 categories such as: Movies, Cars, Funny, Animals, Christmas, Models, Guys, Space, Cute, Sports, Games, Beaches, Water, Messages, Night, Hearts, Swirls, Explosions, Buildings, Cities, Fantasy, Sunsets, Technology, Flowers and many more.
	Touch Hockey: FS5 Touch Hockey: FS5 is an iPhone game developed by FlipSide5, Inc. Touch Hockey outclasses every air hockey game available on the iPhone and iPod touch with the fastest animations possible and it’s FREE! It features instant Replay, multi-player WiFi local network support, real-time 3D mallet rendering, 9 levels for ‘smart’ one-player game play and 4 game length settings.
	Facebook Facebook is a social networking application developed by Facebook, Inc. Facebook for iPhone makes it easy to stay connected and share information with friends. Use your iPhone to start a conversation with Facebook Chat, check your friends’ latest photos and status updates, look up a phone number, or upload your own mobile photos to Facebook while on the go.
	Pac-Man Pac-Man is an iPhone Game developed by Namco. It’s the world famous arcade classic, returns in this faithful rendition for your iPhone! Who can forget the countless hours and quarters spent avoiding pesky ghosts while chompin’ on dots and gobbling up the fruit for bonus points? Relive the retro arcade action!
	iBowl iBowl is an iPhone Game developed by SGN. From the makers of iGolf comes iBowl, the newest way to go bowling with your iPhone. Simply swing your iPhone like a bowling ball and see how many strikes you can get!
	MySpace Mobile MySpace Mobile is asocial networking application developed by ySpace.com.  It let you stay connected with your friends… anytime, anyplace! You can send and receive messages and browse your network of friends… see their current status. It let you upload and share photos from your iPhone and post comments on friends’ profiles and photos.
	Google Earth Google Earth is a travel application developed by Google Inc. With Google Earth for iPhone and iPod touch, you can fly to far corners of the planet with just the swipe of a finger. Explore the same global satellite and aerial imagery available in the desktop version of Google Earth, including high-resolution imagery for over half of the world’s population and a third of the world’s land mass.
	Labyrinth Labyrinth is iPhone games developed by Codify AB. The classic labyrinth game where you control a steel ball by tilting a wooden labyrinth. Download and play over 1000 levels and more as they are created by the community.
	Pandora Pandora is music application developed by Pandora Media, Inc. Pandora Radio is your own FREE personalized radio now available to stream music on your iPhone. Just start with the name of one of your favorite artists, songs or classical composers and Pandora will create a “station” that plays their music and more music like it.
	AIM AIM is social networking application developed by AOL. AIM® lets you stay connected with the people you care about right on your iPhone or iPod Touch. AIM is more than an instant messaging service – it’s a better way to connect. Mobile AIM lets you communicate whenever you want, wherever you are, in whatever way that suits you best. Connect with friends and family and keep track of status, location, and presence updates in real time.
	Flashlight Flashlight is utilities application developed by John Haney. Flashlight fills your screen with bright white light to illuminate your world when you find yourself in a dark spot or concert. It features full white screen, custom color and slide and flick up and down to dim the screen.
	Virtual Zippo Lighter Virtual Zippo Lighter is a lifestyle application developed by Moderati Inc. and Zippo. The Virtual Zippo Lighter opens with a flick of your wrist and lights with a turn of your thumb. The windproof flame sways as you move your iPhone or iPod Touch and reacts when you try to blow it out. Choose from a variety of Zippo Lighter images and customize a handful selected lighters too.
	Movies Movies is a news application developed by Flixster. Movies is the best way to watch trailers and quickly get showtimes on your iPhone. It features listings of the top box office leaders and movies opening soon, DVD catalog of over 50,000 films, more than 10,000 high quality trailer and video clips, show times for movies playing at the boxoffice and Maps to theaters and online ticket ordering.
	Hangman Hangman is a iPhone game developed by Jamsoft. Hangman is based on the popular word guessing game by the same name. The player guesses letters in order to uncover the hidden word. But be careful, you only have a few guesses before you’re hanged!
	Bubblewrap Bubblewrap is a entertainment developed by Orsome Software Ltd. Here is the original BubbleWrap app for the iPhone/Touch! Strangely additive and fun game where you pop the virtual bubbles as fast as you can.
	Lightsaber Unleashed Lightsaber Unleashed is a entertainment application develop by Lucasfilm Ltd. As you swing your phone, a range of Lightsaber™ sound effects will be emitted from your phone’s speaker (or connected audio output). Not only that, but you can also draw and withdraw your Lightsaber. You can also choose your Force Unleashed character of choice, as well as playing some duelling music to get you in the mood!
	Shazam Shazam is a music application developed by Shazam Entertainment Ltd. Create and share music moments and stories. With Shazam you can identify music tracks, buy them, and share the tags with friends. You can also learn more about artists; keep and grow your music collection and personalize your tags.
	Mazefinger Mazefinger is iPhone Game developed by ngmoco. Penetrate a seemingly endless collection of challenging mazes and race to the exit before your energy runs out! MazeFinger showcases the visual power of your iPhone & iPod touch with incredible special effects that blanket the screen with explosive energy.
	Cube Runner Cube Runner is a iPhone game developed by Andy Qua. Fly your ship across a landscape whilst avoiding the many treacherous cubes which lie in your path. Swoop through narrow gaps using the built-in accelerometer .
	Sol Solitaire Sol Solitaire is an iPhone game developed by Smallware LLC. Sol Free™ is Smallware’s free handheld solitaire, now on iPhone and iPod Touch. Get 6 free games from our Solebon pro solitaire: Klondike Deal 1, Klondike Deal 3, Baker’s Game, Baker’s Game Easy, Demon and Spiderette. Play the game enjoyed by millions of players
	Crazy Penguin Catapult Crazy Penguin Catapult is an iPhone game developed by Digital Chocolate Inc. Help the penguins win back Antarctica and play the first 6 levels of Crazy Penguin Catapult for FREE! Get more levels, power-ups, and game modes by downloading the Full Version. The Full Version features 2 games in 1: Launch over 200 penguins in Campaign Mode or play endless matches in the turn-based Strategy Mode. Watch your score bubble up as you are racing to break ice blocks and knock over polar bears.
	Topple Topple is an iPhone game developed by gmoco. Topple, the most addictive stacking game ever is exclusively available on iPhone & iPod Touch! Stack and balance a family of mischievous & dysfunctional shapes using multi-touch controls to slide and rotate them into position. Build your way to victory but remember to keep your balance by tilting the screen to prevent your teetering tower of blocks from Toppling to their doom.
	Sudoku Sudoku is an iPhone game developed by Mighty Mighty Good Games. With unique handcrafted puzzles across four different skill levels, Sudoku (Free) is a great introduction to the fun and puzzle solving challenge of Sudoku.
	Remote Remote is an entertainment application developed by Apple. With Remote, you can control the music on your computer or Apple TV from your iPod touch or iPhone. Play, pause, skip, shuffle. See your songs, playlists, and album art on your iPod touch or iPhone as if you were right in front of your computer.